The High Capacity Manual Spark Ignition Flame Control System uses a standing pilot with thermocouple sensor to safely control gas flow. A manual flame height adjuster, manual switch spark igniter (battery powered), and a safety pilot valve mounted in a stainless steel box are all you need to enjoy a fire in safety and comfort. Convenient and safe, Flame Control Systems give you control over the height of a flame. And, if the fire happens to go out, the Flame Control System will automatically relight your fire pit to prevent gas escaping.   PRODUCT FEATURES: Includes: 36″ Pilot Assembly w/ Spark Igniter and Blowout Box, Flex Line, Hard Pipe, and Fittings. Easy Ignition For Fire Rings Up to 24″ or 36″ Linear Burner Rated Up to 140K BTUs Manual Spark Flame Sensor Requires AA Batteries Dimensions: 7″ W x 5″ D x 2″ H HPC has partnered with BILT to provide you with an easy-to-use app that walks you through the installation process, and assists in troubleshooting of your new fire pit. You can download this app by searching for “BILT” in your app store (available for Android and iOS ).